Mckee AC EV Charger with Full Multi-Layer Safety Protection Safety is engineered into every layer of the Mckee AC EV Charger. Built around a complete protection suite, the unit continuously guards against overvoltage, undervoltage, overload, short circuit, leakage, poor grounding and lightning surges, protecting both the vehicle and the user during every charging session. Designed for reliable long-term operation, the charger works across a wide temperature range of -20°C to